Tag: zoology

Questions Related to zoology

Which one of the following is the correct description of a certain part of a normal human skeleton ?

zoology musculo - skeleton system gait of animals basics of joints joints and type of joints skeleton, joints and muscles

  1. Parietal bone and the temporal bone of the skull are joined by fibrous joint.

  2. First vertebra is axis which articulates with the occipital condyles.

  3. The 9th and 10th pairs of ribs are.called the floating ribs.

  4. Glenoid cavity is a depression to which the thigh bone articulates.

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Correct Option: A
Explanation:

Fibrous joints are connected by dense connective tissue consisting mainly of collagen, also called immovable joints.

So, the correct option is 'Parietal bone and the temporal bone of the skull are joined by fibrous joint.'.

Sutures are

zoology musculo - skeleton system gait of animals basics of joints joints and type of joints skeleton, joints and muscles

  1. Movable joints

  2. Cracks in the skull bone

  3. Immovable joints

  4. Both B and C

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Correct Option: D
Explanation:

A suture is a type of fibrous joint, which only occurs in the skull (or cranium). They are bound together by Sharpey's fibres. These joints are synarthroses. A small movement is permitted at sutures, which contributes to the compliance and elasticity of the skull.

If a ligament is cut or damaged the joint becomes

zoology musculo - skeleton system gait of animals basics of joints joints and type of joints skeleton, joints and muscles

  1. Freely movable

  2. Immovable

  3. Unaffected

  4. Unstable

Show answer
Correct Option: D
Explanation:

The connective tissues which are found around joints are the ligaments and this help to stabilise the joint, maximise its strength and prevent any excess movement of the joints. The ligaments are attached to both sides of the bones and any tear or injury to the ligaments tends to make the joints unstable. So, the correct answer is option D.

Which one of the following membranes secretes a watery fluid that lubricates and cushions the joint ?

zoology musculo - skeleton system gait of animals basics of joints joints and type of joints skeleton, joints and muscles

  1. Tendons

  2. Ligaments

  3. Cartilage

  4. Synovial membrane

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Correct Option: D
Explanation:

The synovial membrane is the membrane that lines the articular surfaces of the bones of the synovial joint. Its secretes a watery fluid that lubricates and cushions the joint. It reduces the friction during movement.

Tendon is a cord of strong fibrous collagen tissue that connects muscles to bones and doesn't secrete any fluid. 
The ligament is a band of flexible fibrous connective tissue that connects bone to bone and doesn't secret any fluid. 
Cartilage is a tough and flexible material that acts as a cushion between the bones of joints and doesn't secret any fluid. 
So the correct option is D.

Rate of replacement of species along a gradient of habitats/communities is called 

zoology diversity of life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

  1. $\alpha$ - diversity

  2. $\beta$ - diversity

  3. $\gamma$ - diversity

  4. $\omega$ - diversity

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Correct Option: B
Explanation:

The local species pool is known as alpha diversity. It is also the diversity present within the community. Beta diversity is the diversity present between the communities. The diversity present in the ranges of communities is known as Gamma diversity.

So, the correct answer is 'β - diversity'.

The term biodiversity is related to 

zoology diversity of life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

  1. All living plants

  2. All living animals

  3. All living plants and animals

  4. Living plants, animals and microbes found in their natural habitats

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Correct Option: D
Explanation:
Biodiversity is the term popularised by the sociobiologist Edward Wilson to describe the combined diversity at all the levels of biological organization. It is related to all living plants, animals, and microbes found in their natural habitats. There are more than 20,000 species of ants, 3,00,000 species of beetles, 28,000 species of fishes and nearly 20,000 species of orchids. The biodiversity is measured at three levels; genetic diversity, species diversity and ecological diversity.
So, the correct answer is 'Living plants, animals and microbes found in their natural habitats'.

According to, May's global estimates how many species of plants and animals, respectively, are yet to be discovered and described from India? 

zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification five kingdoms of living organisms biodiversity and need of classification biodiversity and classification

  1. 50,000 and 90,000

  2. 3,00,000 and 90,000

  3. 3,00,000 and 1,00,000

  4. 1,00,000 and 3,00,000

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Correct Option: D
Explanation:

If we accept May's global estimates only 22% of the total species have been recorded so far. If May's proposal for discovery of new species is accepted then there are probably more than 1,00,000 plant species and more than 3,00,000 animal species yet to discovered and described.

Western ghats have a greater number of amphibian species than the Eastern ghats. What kind of diversity does it represent?

zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification five kingdoms of living organisms biodiversity and need of classification biodiversity and classification

  1. Species diversity

  2. Genetic diversity

  3. Ecological diversity

  4. None of these.

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Correct Option: A
Explanation:

Species diversity is the variety in the number and richness of the species of a region, Western Ghats have greater amphibian species diversity as compared to eastern ghats.

Vertical distribution of different species occupying different levels in dense vegetation is called.

zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification five kingdoms of living organisms biodiversity and need of classification biodiversity and classification

  1. Stratification

  2. Species composition

  3. Standing crop

  4. Trophic structure

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Correct Option: A
Explanation:

Vertical distribution of different species occupying different levels is called stratification. For example, trees occupy top vertical strata or layer of a forest, strubs the second and herbs and grasses occupy the bottom layers.

The term "the evil quarter" is related with four major causes of 

zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification five kingdoms of living organisms biodiversity and need of classification biodiversity and classification

  1. forest loss

  2. population explosion

  3. air pollution

  4. biodiversity losses.

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Correct Option: D
Explanation:

There are four major causes of biodiversity losses which are collectively called as the evil quartet. These are habitat loss and fragmentation, over exploitation, alien species invasion and co-extinctions.